Created attachment 208698 [details]
Upgrade to new GCC on GCC architectures instead of removing compilator flags. This will simplify the Makefile.
Explicitly set signed char. command variable is later compared to -1, which fails on architectures that use unsigned char by default, like arm and powerpc.
A commit references this bug:
Date: Wed Oct 30 14:58:42 UTC 2019
New revision: 516062
Fix build on powerpc and arm
Submitted by: pkubaj